149 



specimens and the specimens from Hekla Havn gave a slight 

 reaction for oil. As is the case in the stem, the quantity of 

 the oil which occurs, doubtless stands in inverse ratio to the 

 starch-contents. 



The lower part of the leaf, the part enclosed by the sheath, 

 differs anatomically from the upper part. Bui here 1 shall only 



Fig. 5. Diapensia lapponica. 



The leaf. Л, stoma; i?, the epidermis of the uppei- suiface seen from above; C, epidermis 



of the upper surface with cuticle; the thickenings in ' the lateral walls are indicated; 



D, pores between cells of the spongy parenchyma; E, cells of the spongy parenchyma; 



F, stomata. (Greenland) (H. E. P.) 



point out that neither stomata nor epidermis, containing water, 

 occur in this part. 



The stem (Figs. 6 and 7). The primary cortex has been 

 figured by Tedin (Tab. I, fig. II); it presents no features that are 



